ua-hearing-page: Add context to "Sound" string
Commit 90a131a2 (!2164 (merged)) split off the translation of the sound panel name "Sound". However, "Sound" might need a unique translation in this case.
So, add a context string to allow for that.
Closes #2915 (closed)
See the linked discussion in #2915 (closed) and the original at !2164 (merged) for more info.